| """Verify downloaded uncompressed files against the SHA256 inventory.""" |
| import argparse |
| import hashlib |
| import json |
| from pathlib import Path, PurePosixPath |
|
|
| def sha(path): |
| h=hashlib.sha256() |
| with path.open('rb') as f: |
| for b in iter(lambda:f.read(4*1024**2),b''):h.update(b) |
| return h.hexdigest() |
|
|
| def verify(root,collection): |
| manifest=json.loads((root/'metadata/manifest.json').read_text()) |
| inventory=root/manifest['file_inventory']['path'] |
| if inventory.stat().st_size!=manifest['file_inventory']['bytes'] or sha(inventory)!=manifest['file_inventory']['sha256']: |
| raise ValueError('File inventory checksum mismatch') |
| files=size=0 |
| prefix={'qlib':'qlib/','minutes':'A股分钟/','all':''}[collection] |
| with inventory.open() as f: |
| for line in f: |
| row=json.loads(line);rel=PurePosixPath(row['path']) |
| if rel.is_absolute() or '..' in rel.parts:raise ValueError('Unsafe inventory path') |
| if not row['path'].startswith(prefix):continue |
| path=root.joinpath(*rel.parts) |
| if not path.is_file() or path.stat().st_size!=row['bytes'] or sha(path)!=row['sha256']: |
| raise ValueError('File verification failed: '+row['path']) |
| files+=1;size+=row['bytes'] |
| if files%10000==0:print(f'Verified {files:,} files / {size:,} bytes',flush=True) |
| selected=[c for c in manifest['collections'] if c['path_in_repo'].startswith(prefix)] |
| if files!=sum(c['files'] for c in selected) or size!=sum(c['bytes'] for c in selected): |
| raise ValueError('Collection totals mismatch') |
| return {'collection':collection,'files':files,'bytes':size,'sha256_verified':True} |
|
|
| def main(): |
| p=argparse.ArgumentParser(description=__doc__) |
| p.add_argument('--repo',type=Path,default=Path('./stock_dataset')) |
| p.add_argument('--collection',choices=['qlib','minutes','all'],default='all') |
| args=p.parse_args();print(json.dumps(verify(args.repo,args.collection),indent=2)) |
|
|
| if __name__=='__main__':main() |
|
|
